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Filmscanners mailing list archive (filmscanners@halftone.co.uk)

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Re: filmscanners: negative and skin tones



I may have recommended it before, but these numbers came from Margulis's
Photoshop book, Chapter 2 being available online at
http://www.ledet.com/margulis/PP6_Chapter2.pdf

Maris

----- Original Message -----
From: "Jim Sharp" <jsharp@illicom.net>
To: <filmscanners@halftone.co.uk>
Sent: Sunday, April 01, 2001 8:38 AM
Subject: Re: filmscanners: negative and skin tones


| Maris and Mikael
|
| These CMYK values for facial skin tones are very useful.
|
| I have been struggling with some of my first scans trying to get the
| skin tones to look right. Of course, in these photographs there aren't
| even any good areas of black or white to help set those points.
|
| By adjusting the color to give me roughly the values you have both
| mentioned, then further adjusting from there, my scans look
| *substantially* better. Not surprisingly, all the colors look much more
| normal. I know this is in a way a backward approach to color adjustment,
| but with these scans the skin tones are what matter to me.
|
| Thanks for the shortcut to at least get me to some baseline.
|
| --
| Jim
|
|
| "Maris V. Lidaka, Sr." wrote:
| >
| > VueScan is very interesting and useful to the subscribers on this group,
and
| > the program is somewhat opaque resulting in the many discussions of what
| > appear to be insignificant details and changes in the different
versions.  I
| > would venture to say that Vuescan is the primary scanning program used
| > though I have no statistics on which to base that.
| >
| > Concerning the CMYK values for skintones, your guidelines appear to be
more
| > or less correct.  I have found Dan Margulis's guidelines to be a bit
better
| > and empirically more accurate.  He maintains that, for Caucasians, cyan
| > should be about 1/5 to 1/3 of magenta (Professional Photoshop 5) rather
than
| > 1/2 as you suggest.
| >
| > Another problem that comes to mind is that scanners export the image in
RGB
| > and desktop printers (without exceptions that I am aware of) require RGB
| > input, performing the RGB-CMYK conversion internally.  As there is loss
in
| > color in the RGB-CMYK conversion and the subsequent CMYK-RGB
re-conversion
| > many try to avoid having to color-correct in CMYK despite the benefits
of
| > the black channel.
| >
| > Maris
| >
| > ----- Original Message -----
| > From: "Mikael Risedal" <risedal@hotmail.com>
| > To: <filmscanners@halftone.co.uk>
| > Sent: Saturday, March 31, 2001 11:24 AM
| > Subject: filmscanners: negative and skin tones
| >
| > | To the scanner group.
| > |
| > | As a photographer Im "little bit tired "of reading  about  ( VueScan
nr
| > | xxxx ) and i hoped  to learn something from  other people in the
group,
| > who
| > | can be  more interesting and useful.
| > |
| > | Therefor i begin with a small tip:
| > | To some of you who all ready know it- come with a  another tip !
| > |
| > | Scanning negative film and skin tones are sometimes a tuff job. You
have
| > | nothing to compare against,  (as with a slide.)
| > | Faces  and skin tones become often to red in printing,  A good rule is
to
| > | measure the face skin tone in a CMYK profile known for printing
purpose.
| > | (do it in Photoshop 5.0  6.0)
| > | If you make corrections and have
| > | C  about half of  magenta
| > | M  less then Yellow
| > | Y   more then magenta + 5-10 %
| > | K   -
| > | This figures give you a more natural skin tone in printing , and the
red
| > and
| > | ugly are goon.
| > |
| > | Another good rule  to know is that
| > | Grey in CMYK are about  C= 32  M=20 Y0=20
| > | You can  often estimate something in the picture who are grey.
| > |
| > | Mikael Risedal
| > | Photographer
| > | Lund
| > | Sweden
|




 




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